Remove ActionController::Base#view_controller_internals

Get rid of ActionController::Base#view_controller_internals flag and
use @@protected_view_variables for storing the list of controller
specific instance variables which should be inaccessible inside views.

actionpack/CHANGELOG

@@ -1,5 +1,7 @@
 *SVN*
 
+* Remove ActionController::Base#view_controller_internals flag. [Pratik]
+
 * Add conditional options to caches_page method. [Paul Horsfall]
 
 * Move missing template logic to ActionView. [Pratik]

actionpack/lib/action_controller/base.rb

@@ -253,16 +253,11 @@ class Base
     DEFAULT_RENDER_STATUS_CODE = "200 OK"
 
     include StatusCodes
-
-    # Determines whether the view has access to controller internals @request, @response, @session, and @template.
-    # By default, it does.
-    @@view_controller_internals = true
-    cattr_accessor :view_controller_internals
-
-    # Protected instance variable cache
-    @@protected_variables_cache = nil
-    cattr_accessor :protected_variables_cache
-
+
+    # Controller specific instance variables which will not be accessible inside views.
+    @@protected_view_variables = %w(@assigns @performed_redirect @performed_render @variables_added @request_origin @url @parent_controller
+                                    @action_name @before_filter_chain_aborted @action_cache_path)
+
     # Prepends all the URL-generating helpers from AssetHelper. This makes it possible to easily move javascripts, stylesheets,
     # and images to a dedicated asset server away from the main web server. Example:
     #   ActionController::Base.asset_host = "http://assets.example.com"
@@ -1207,24 +1202,11 @@ def reset_variables_added_to_assigns
       end
 
       def add_instance_variables_to_assigns
-        @@protected_variables_cache ||= Set.new(protected_instance_variables)
-        instance_variable_names.each do |var|
-          next if @@protected_variables_cache.include?(var)
+        (instance_variable_names - @@protected_view_variables).each do |var|
           @assigns[var[1..-1]] = instance_variable_get(var)
         end
       end
 
-      def protected_instance_variables
-        if view_controller_internals
-          %w(@assigns @performed_redirect @performed_render)
-        else
-          %w(@assigns @performed_redirect @performed_render
-             @_request @request @_response @response @_params @params
-             @_session @session @_cookies @cookies
-             @template @request_origin @parent_controller)
-        end
-      end
-
       def request_origin
         # this *needs* to be cached!
         # otherwise you'd get different results if calling it more than once

actionpack/lib/action_controller/caching/actions.rb

@@ -41,7 +41,6 @@ def self.included(base) #:nodoc:
         base.extend(ClassMethods)
           base.class_eval do
             attr_accessor :rendered_action_cache, :action_cache_path
-            alias_method_chain :protected_instance_variables, :action_caching
           end
       end
 
@@ -55,10 +54,6 @@ def caches_action(*actions)
       end
 
       protected
-        def protected_instance_variables_with_action_caching
-          protected_instance_variables_without_action_caching + %w(@action_cache_path)
-        end
-
         def expire_action(options = {})
           return unless cache_configured?
 

actionpack/test/controller/new_render_test.rb

@@ -529,26 +529,10 @@ def test_private_methods
   end
 
   def test_access_to_request_in_view
-    view_internals_old_value = ActionController::Base.view_controller_internals
-
-    ActionController::Base.view_controller_internals = false
-    ActionController::Base.protected_variables_cache = nil
-
-    get :hello_world
-    assert !assigns.include?('_request'), '_request should not be in assigns'
-    assert !assigns.include?('request'), 'request should not be in assigns'
-
-    ActionController::Base.view_controller_internals = true
-    ActionController::Base.protected_variables_cache = nil
-
     get :hello_world
     assert !assigns.include?('request'), 'request should not be in assigns'
     assert_kind_of ActionController::AbstractRequest, assigns['_request']
     assert_kind_of ActionController::AbstractRequest, @response.template.request
-
-  ensure
-    ActionController::Base.view_controller_internals = view_internals_old_value
-    ActionController::Base.protected_variables_cache = nil
   end
 
   def test_render_xml